Rolling-mill.



Patented 'Apr. 3, 1917.

2 SHEETS-SHEET I.

W. C. CORYELL.

ROLLING MILL APPLICATION HLED AUG.2I, I915.

W. C. CORYELL.

ROLLING MILL.

APPLICATION FILED AUG-21.19.15.

Patented Apr. 3, 1917.

2 SHEETS-SHEET 2.

T HG]. HI.

INVENTOR- u c. consent, or Younesrown, onro.

ROLLING-MILL.

1,22TJU29.

Specification of Letters Patent.

Patented Apr. 3, 19M.

Application filed August 21, 1915. Serial no. team.

To all whom it may concern."

Be it known that I, WILLIAM 0.00am, a citizen of the United States, residing at Youngstown, county of Mahoning, State of Ohio, have invented certain new and useful Improvements in Rolling-Mills, of which the following is a specification.

The present invention relates to rolling mills generally and more particularly to mills of the type employed in producing endless articles, such as belts, bands, hoops, etc., from rings or perforated pieces of metal.

One object of the invention is to produce a mill of such construction that the perforated piece nr blank may be encircled readily (threaded) over one of the rolls and the latter placed in operative position in the mill.

Tn such mills it is common. to employ a wheel which is threaded through the blank after it has been partially lengthened by the action of the reducing rolls and to utilize the same to draw the enlarging loop outward away from the rolls as it is still further lengthened. Another object of the invention is to provide an adjustment for such wheel so that the same may be readily kept in alinement with the working space on the rolls. Another object of the invention is to so arrange the parts of the mill that there will be no tendency of the threading roll to be dislodged during operation. Another object is to provide a scale or pointer in association with the trolley so that the length ofthe'belt may be determined at any time by a simple inspection of the relative position of the pointer and scale. Other objects are case and efliciency of operation, accessibility of parts for removal and repair, and rigidity of structure. These and still other objects and advantages of the invention will be more fully understood upon reference to the following detailed description taken in connection with the accompanying drawing, and the scope of the invention will be particularly pointed out in the appended claims. I

In the drawing Figure l is a plan view of a rolling mill constructed in amordance With the present invention; Fig. 2 is a side elevation of the same, one of the housing frames being removed for clearness and certain parts being shown in section; Fig. 3 is a front elevation of the mill omitting the trolley and associated mechanism by which the belt is supported and drawn out during Its formation; and Fig. 4 is a diagram of the rolls, trolley and the associated weight for drawing the trolley outward from the rolls. Throughout these views like characters refer to like parts. 1

Referring to the drawing in detail: A designates the shoes upon which the frames or housings B are mounted, the feet U of the latter resting directly upon the shoes. These housings are of rigid construction and each is provided, as usual, with a central opening or window W. They are spaced.

apart and held in spaced relation by the separators T, which consist in each instance of a spacing sleeve interposed between the frames and a bolt passing through the frames and sleeve and provided with nuts or keys at its opposite ends. Each of the housings is provided with a lower box or hearing D upon which the ends of the lower roll C are journaled. These boxes D, lie at the bottom of the windows W and the ends are held in position by the'housings at the sides of the window. The housings B are provided with similar upper bearings or boxes D These are similar in construction to boxes D and are similarly engaged at their ends by the portions of the housings at the sides of the window. The upper boxes D serve as bearings for the upper roll C They are also adjustable. The housings are also provided at one side of the windows W with intermediate bearings or boxes X which serve as bearings for the intermediate roll C It will be noted that the upper roll bears against the under side of its boxes,

the lower roll against the upper side of its boxes, and the intermediate roll against the rear side of its boxes. It will also be noted that the intermediate roll is preferably slightly out of vertical alinement-with the upper and lower. rolls so that when the latter are in proper adjustqinl position the in termediate roll is firm-1y held in place and cannot be dislodged until the upper and lower rolls are moved apart. The lower boxes D are provided on their under sides with relatively large faces which engage corresponding faces upon the lower' portion of the housing frame, the faces in each instance being substantially at right angles to the line'of centers of the rolls G and C so as to efficiently take up the stress incident to operation. The upper boxes l) have a corresponding face which is at right angles to the line of centers of the rolls C and 0,. These faces are in each instance engaged by the breaker E of the screw F of what 1s commonly known as the screw down. The screw F is in each instance preferably in alinement with the centers of the rolls C, and C In each instance it IS threaded through a threaded opening in the upper portion of the housing or through a nut in serted in the housing. A screw down wheel S, or other control wheel is prov ded at the upper end of each screw F. Vlth this an rangement it will be seen that in operation all the main forces which are exerted upon the intermediate roll 0 are directed toward the center of the latter and are so positioned that they hold the roll C in operative position in the structure and prevent its dislodgment. \Vhen it is necessary to remove it, such a removal can take place only after raising the upper boxes D by operating the screw-down mechanism. The rolls 0,, C

and C are provided respectively with intermeshing gear teeth Z Z and Z and power. is applied to the train through the wabblers Y and Y upon the ends of the rolls C and 6,, respectively. The means for transmitting power from an electric motor, steam-engine, or other prime mover, to the wabblers, forms no part of the present invention and need not be described. Any suitable means may be employed for this purpose.

The screw-down mechanism is operated so as to raise the upper boxes and the upper roll far enough to allow the intermediate roll to be wholly or partially withdrawn from the structure of the mill. In practice bevel gears will operate the screw-down from a common shaft as is done in other mills at present. When the roll is withdrawn, the ring or perforated piece of metal which constitutes the blank, is slipped over the roll and the latter is put back in place in the structure. The blank may be either cold rolled or hot rolled. In the latter case it will of course be heated to the proper temperature before being put into position on the roll. The screw-down mechanism is then operated to force the 'upper roll against the blank upon the upper side of the intermediate roll. When the requisite amount of pressure has been applied by the screwdown mechanism the power is applied which sets the rolls in operation. During the rotation of the rolls the blank is reduced in thickness and in consequence is lengthened. The increase in width is very small as compared to increase of length. In the preferred construction only two of the rolls are employed in reducing the material. As illustrated, this is brought about by the upper and intermediate rolls. In order to prevent the lower roll from acting upon the material in this way, the surface of said roll is depressed or cut away so as to leave a free passageway for the material of the article which is being formed. Tlns cu taway or depressed portion which is designated a may be of any desired width and depth, depending upon the section to be rolled. This constitutes a dummy pass.

WVhen the material of the article has been reduced to such an extent that its length is considerable, it is advisable to draw out the lengthened loop from the rolls and to hold it in position to prevent undue distortion. A blank which has been reduced and thus lengthened is illustrated in the drawing and designated V. In the present instance the loop V is held in position during further operation of the rolls by a pulling wheel or pulley K mounted upon a trolley frame G, which is adapted to be drawn forward from the rolls as the loop V lengthens. The pulley K is removably journaled between the bifurcated arms of the bearing member 0 and the latter is threaded upon a transverse screw L. As shown in Fig. 2, the free ends of the arms of the bearing member 0 are turned upward so as to form hooks or recesses for the reception of the axle of the pulley K. By reason of this construction, the pulley may be readily put in place after having been threaded into the loop of the article. The adjusting screw L is j ournaled at its ends in the upward extensions of the frame G and is free to be rotated by the hand wheel N so as to shift the bearing member O to the right or left, to keep the wheel 'K in proper alinement with the working portions of the reducing rolls.

A collar or nut M is threaded on the screw L and said nut and the hub of the hand-wheel N are positioned on opposite sides of a portion of the frame G and thus serve tohold the screw L in a substantially fixed longitudinal position, therebv giving accuracy of control over the position of the pulley K. The trolley frame G is provided with track wheels J mounted upon suitable axles H and adapted to ride upon a track formed by the rails R. This track extends toward and from the reducing rolls of the mill and lies forward of the same, as clearly illustrated. A rope P is secured at one end to the bearing member 0 by being passed through an opening in said member. and extends forward either over a pulley P to a weight W, as illustrated in Fig. 4, or to any other suitable mechanism for applying a pull sufiicient to maintain the loop V under the proper tension as it is being worked upon by the rolls of the mill.

In order to determine approximately the length of the loop V as it is being worked upon, and in order to determine when it is approaching close to the right length, the trolley frame G is preferably provided with a pointer P which extends downwardly into close proximity to a scale S marked on the remove the roll. If this were the top roll near-,oae

the pointer and scale may be differently located, it being essential only that one be fixed and the other movable with the trol ley. In practice, other more refined methods of measurement may be used for determining the final finished length.

From this description it will be seen that the roll C and the belt wheel K may be readily removed from their respective bearings, the former to enable the blank to be initially placed in position upon it, and the latter to have the partly formed article placed over it whenever it has reached a length such as'to permit the employment of the trolley with its resultant advantage of preventing undue distortion. I have used the term removable as applied to roll C, and in the claims in the sense of readily removable. In-a certain sense the roll of any mill is removable in that it can be taken out. But such operation requires a long time whereas my roll can be removed in considerably less than a minute. In taking out a roll of the art, it is usual to remove the cap and cap bolts and by means of a crane of a three high mill it would then be necessary to remove the intermediate roll in the same way, taking out the roll and its boxes. Large wrenches and dolly bars or sledges are ordinarily used for this purpose and several hours are consumed in the work. In contrast to this, the screw-down of my mill can be operated in say fifteenv seconds and the roll removed in say the next fifteen secends, the whole operation consuming considerably less than a minute.

It will be apparent that in many respects the embodiment of the invention herein disclosed may be altered and varied without departing from the spirit and scope of the claims.

I claim as my invention the following:

1. A mill for rolling endless articles including boxes, a roll journaled in said boxes when in its operative position and removable transversely of its axis out of said operative position and out of engagement with said boxes, and a plurality of cooperating rolls for applying forces from a plurality of directions to cooperate with the force applied thereto by said boxes, to maintain said roll in proper operative position.

2. A mill for rolling endless articles including boxes, a roll journaled in said boxes when in its operative position and removable transversely of its axis out of said operative position and out of engagement with said boxes, a plurality of additional rolls for applying forces from a plurality of directions to cooperate with the force applied thereto by said boxes, to maintain said roll in proper operative position, and means for adjusting one of said additional rolls to allow of the removal and replacement of said roll.

3. A mill for, rolling endless articles including boxes, a roll journaled in said boxes when in its operative position and removable transversely of its axis out of said operative position and out of engagement with said boxes, a second roll cooperating with said removable roll to reduce the'material worked upon, and a third roll combining with said second roll and said boxes to apply opposing forces to said removable roll, when in operation, from at least three directions to maintain said removable roll in proper oper ative position.

4. A mill for rolling endless articles including a removable roll adapted to receive the material to be worked upon, a second roll cooperating with said removable roll toreduce said material, bearings for engaging one side only of each of the journals of said removable roll, a third roll for cooperating with said bearings and said second roll to apply opposing forces to said removable roll, when in operation, from at least three directions to maintain said removable roll in proper operative position, and means for adjusting one of said rolls to allow of the remolval and replacement of said removable rol 5. A mill for rolling endless articles including two relatively adjustable rolls, a removable roll adapted to receive the material to be worked upon and positioned intermediately of said relatively adjustable rolls'and out of alinement therewith, and means for preventing any movement tending to increase said non-alinement beyond a given point, whereby upon proper adjustment of said relatively adjustable rolls said removable roll is held firm during operation by opposing forces applied to it from different directions.

6. A mill for rolling endless articles including two relatively adjustable rolls, an intermediate roll having the portions of its surface which lie nearest to said adjustable rolls respectively less than 180 degrees apart, measured on the circumference of said intermediate roll, and an abutment for holding said intermediate roll in operative position intermediately of said adjustable rolls in opposition to the force resulting from any relative adjustment of said adjustable rolls toward each other.

7. A mill for. rolling endless articles including two housings suitably bolted and spaced, intermediate bearings on said hous-. ings, upper and lower bearings on said housings above and below and rearward of said intermediate bearings, rolls journaled at their ends in said upper and lower bearings respectively, an intermediate roll j ournaled at its ends in said intermediate bearings and removable therefrom out of engagement with said intermediate bearings in a direction transverse to the axis of one of said other rolls, and screw mechanism for shifting one set of said bearings to bring all of said rolls into working relation.

8. A mill for rolling endless articles including two housings suitably bolted and spaced, upper and lower boxes on each of said housings, an intermediate box on each of said housings forward of said upper and lower boxes, rolls journaled at thelr ends in said upper, lower and intermediate boxes respectively, said lower boxes having relatively large faces engaging with their respective housings, said faces lying at right angles to the line of centers of said lower and intermediate rolls, and an adjusting screw threaded through the upper portion of each of said housings in line with the line of centers of said upper and intermediate rolls and operatively engaging a face on the corresponding upper box.

9. A mill for rolling endless articles including boxes, a roll adapted to receive material to be worked upon, said roll being jour-,

naled in said boxes when in its operative position and removable transversely of its axis out of said operative position and out of engagement with said boxes, a roll bearing upon said removable roll to assist in holding ings above and below and rearward of said intermediate bearings, rolls journaled at their ends on the under side of said upper bearings and on the upper side of said lower bearings respectively, an intermediate roll j ournaled at its ends against the side of said intermediate bearings and removable out of engagement with said intermediate bearings in a direction transverse to the axis of one of said other rolls, and screw mechanism for shifting one set of said bearings to bring all of said rolls into working relation.

11. A mill for rolling endless articles in.- cluding two housings suitably positioned so as to provide a space between them for the passage of the article being worked upon, .a plurality of relatively'fixed rolls, a removable roll, said fixed and removable rolls having their work-engaging surfaces located between said housings, and means for mounting and retaining said rolls whereby said removable roll may be held in operative po- -sitionby said fixed rolls and upon adjustatter may be removed bodily from movable therefrom in a horizontal direction,

other boxes in said housing, and another roll journaled in said latter boxes and operative to engage said removable roll to cooperate therewith to work the material of the article, said latter roll being positionedforward of the said vertical sides of said boxes whereby said latter roll exerts a force tending to hold said removable roll in operative position.

13. A mill for rolling endless articles including three parallel cooperating rolls, the first and second rolls cooperating to reduce the material worked upon, and the second and third rolls engaging each other but the third having a portlon of its surface provided with an unvarying depression so as not to engage the material whereby said second and third rolls do not cooperate to reduce said material. I

14.. A mill for rolling endless articles including three parallel cooperating rolls, the first and second rolls cooperating to reduce the material worked upon, and the second and third rolls engaging each other but the third having a portlon of its surface provided with an unvarying depression so as not to engage the material whereby said second and third rolls do not cooperate to reduce said material, and means whereby said first roll operates in toothed conjunction with said second roll.

15. A mill for rolling endless articles including three parallel cooperating rolls, the first and second rolls cooperating to reduce the material worked upon, and the second and third rolls engaging each other but the third having a portlon of its surface provided with an unvaryin depression so as not to engage the materia whereby said second and thirdrolls do not cooperate to reduce said material, and means whereby said second roll operates in toothed conjunction with said first and third rolls.

' forces to said removable roll, when m operation, from at least three directions to maintain said removable roll in proper operative position, and means whereby said removable roll operates in toothed conjunction with said second roll.

17. A mill for rolling endless articles including two relatively adjustable rolls, a removable roll adapted to receive the material to be worked upon and positioned intermediately of said relatively adjustable rolls and out of alinement therewith, means for preventing any movement tending to increase said non-alinement beyond a given point, whereby upon proper adjustment of said relatively adjustable rolls said removable roll is held firm during operation by opposing forces applied to it from different dlrections, and means whereby said removable roll operates in toothed conjunction with at least one of said adjustable rolls.

18. A mill for rolling endless articles including a suitable housing structure, a pair of boxes in said structure having bearing surfaces on one side, a removable roll having its journals bearing against said surfaces, whereby said roll may be removed from said surfaces in a direction transverse to the axis of said roll, and a pair of other rolls for applying a resultant force against said roll in opposition to that exerted by said boxes through their bearing surfaces, whereby said roll is held firmly in operative position.

19. A mill for rolling endless articles including a suitable housing structure, a pair of boxes in said structure having bearing surfaces on one side, a removable roll having its journals bearing against said surfaces, whereby said roll may be removed from said surfaces in a direction transverse to the axis of said roll, and other rolls, including a roll operatively engaging said re fat movable roll, for applying a resultant force against said roll in opposition to that exerted by said boxes through their bearing surfaces, whereby said roll is held firmly in operative position.

20. A mill for rolling endless articles including a suitable housing structure, a pair of boxes in said structure having bearing surfaces on one side, a removable roll having its journals bearing against said surfaces, whereby said roll may be removed from said surfaces in a direction transverse to the axis of said roll, other rolls, including a roll operatively engaging said removable roll, for applying a resultant force against said roll in opposition to that exerted by said boxes through their bearing surfaces, whereby said roll is held firmly in operative position, and means for adjusting one of said rolls toward and away from the other.

21. A mill for rolling endless articles including a suitable housing structure, a pair of boxes in said structure having bearing surfaces on one side, a removable roll having its journals bearing against said surfaces, whereby said roll may be removed from said surfaces in a direction transverse to the axis of said roll, a second roll cooperating with said removable roll to reduce the material worked upon, and a third roll combining 'with said second roll and said boxes to apply opposing forces to said removable roll, when in operation, from at least three directions to maintain said removable roll in proper operative position.

WILLIAM G. CORYELL. 

